50 CEBIDJE. 



Var. ? or artificially distorted. Hair of crown radiating from a 

 central line forming an oblong crest. B. M. 



C. cristatus, G>-ai/, MS. 

 Hab. Brazil. 



7. Cebus xanthocephalus. The Monk Cehus. B. M. 



Fur short, stiff, black- and yellow-varied ; crown, temples, whis- 

 kers, chin, shoulders, haunches, arms, legs, and tail black ; back 

 and sides, especially behind, yellow, more or less black-washed ; 

 sides of neck, chest, and front of shouldei's yellow. The hair of 

 the crown reflexed, short ; forehead and temples whitish yellow. 



Var. 1. Shoidders and loins pale-yellow; outside of thighs and 

 base of tail reddish. 



Var. 2. Blacker ; forehead whiter. 



Cebus xantLocephalus, Sjnx, Bras. t. 3 (good). C. mouacliiis, Fischer, 

 C. cucullatiis, 8pix, Bras. t. 6. 



Hah. Paraguay ; Rio Janeiro, Spix. 



See Cehus olivaceus, Schrank, "Wagner, Schreb. v. t. 8. 



8. Cebus albifrons. The White-fronted Cehus. B. M. 



Pale reddish brown ; back and, especially, the outside of limbs 

 redder ; face, forehead, throat, shoulders, and chest white. Tail with 

 rather long hair ; hair of the crown short. 



C. albifi'ons, Grai/, P. Z. S. 1865 ! not Geoffroy. 



Hah. South America. 



9. Cebus hypoleucus. The Wliite-throated Sapajou. B.M. 



Black ; forehead and front of crown, neck and sides of head, 

 shoulders and chest white ; face pale flesh-coloured. 



Sai a gorge blanche, Buffon, H. N. xv. t. 9 ; Audehert, t. 5 ; J^. 

 Cuv. Mamm. Lith. t. Simla hypoleuca, Hmnboldt, Ohs. Zool. p. 337. 

 Cebus hypoleucus, Geoff. Ann. Miis. xix. p. 111. 



Hah. Central America ; Guiana ; Caraccas, Salvin. 



10. Cebus leucocephalus. The White-headed Cehus. B. M. 



Fur dark reddish brown, very obscurely punctulated. Head to 

 the front edge of ears white ; crown with a short narrow central 

 black streak ; feet blackish. 



Cebus leucocephalus, Grai/, P. Z. S. 1865, fig. ! 

 Hah. Columbia. 



See Cehus versicolor, Pucheran, Rev. Zool. 1845, p. 335; I. Geoff. 

 Cat. p. 47. Without frontal streak, and tail paler, perhaps 

 discoloured. Hah. Columbia. 



